correcting the groupId to org.eclipse.jgit.wso2

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176117 a5903396-d722-0410-b921-86c7d4935375
adding jgit 2.3.1-wso2v2 to dependency pom

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176118 a5903396-d722-0410-b921-86c7d4935375